can someone post code on how to

* merge 2 mono wav files into a single stereo wav file (one file in
the left channel one in the right)
* append one wav file to another
* merge 2 stereo wav files into a single stereo wav file (specifying
the "mix" for each channel - the volume for file #1 left and file #2
left, and right, respectively)
* save a section of a wav file (starting second, end second)

VB.NET code or a .NET assembly would be best for my purposes, but any
language would work, all it should be doing that is system-specific
would be binary reading / binary writing the data from the WAV file on
disk...

thanks

Mad Scientist Jr wrote:

The .wav file is just a short 56-byte header, followed by 16-bit samples
one after the other. If it is stereo, the samples are interleaved between
channels.

A 20 or 24 bit wav file will have fullword samples instead of halfword, with
the unused bits being zeroed out. But I am assuming 16-bit stuff he

* merge 2 mono wav files into a single stereo wav file (one file in
the left channel one in the right)

Load the first 56 bytes of one file. Change the header byte saying that
it's mono and make it stereo (the rfc tell you this) and write it to the o
output. Skip the first 56 bytes of the other file. Load a short from one
file, write it to the output. Load a short from the other file and write
it to the output. Continue until you run out.

* append one wav file to another

Here you just load the header, dump it unchanged, and then dump the data
out, one halfword at a time. Then you discard the header from the second
file, and dump the data from that too.

* merge 2 stereo wav files into a single stereo wav file (specifying
the "mix" for each channel - the volume for file #1 left and file #2
left, and right, respectively)

Here you just read a word from each file alternately, multiply by a scaling
factor, add and dump. How you decide to deal with rounding is your issue.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

On Thu, 8 Jul 2004 20:49:45 UTC, (Scott Dorsey)
wrote:

The .wav file is just a short 56-byte header, followed by 16-bit samples
one after the other.

Not necessarily. If the file is PCM it could also be 44 bytes. If it
isn't PCM, it could be anything. Also, there could be any number of
non-audio 'chunks' before the PCM data. You really need to parse the
header to accurately get to the data. Start here for info:
http://msdn.microsoft.com/archive/de...ive/en-us/dx81
_vb/directx_vb/htm/_dx_reading_wave_files_dxaudio.asp

On Thu, 8 Jul 2004 20:49:45 UTC, (Scott Dorsey)
wrote:

The .wav file is just a short 56-byte header, followed by 16-bit samples
one after the other.

Not necessarily. If the file is PCM it could also be 44 bytes. If it
isn't PCM, it could be anything. Also, there could be any number of
non-audio 'chunks' before the PCM data. You really need to parse the
header to accurately get to the data. Start here for info:
http://msdn.microsoft.com/archive/de...ive/en-us/dx81
_vb/directx_vb/htm/_dx_reading_wave_files_dxaudio.asp

(Scott Dorsey) wrote in
:

The .wav file is just a short 56-byte header, followed by 16-bit
samples one after the other.

Well... It's usually a RIFF file with audio data, wich means there can be
other chunks in there as well as the wave data chunks.

Actually, even the audio data can be in a number of different formats,
including compressed ones, so before working on a RIFF wave file you should
allways check what the actual data format is.

Some more info (found by googling):
http://www.sonicspot.com/guide/wavefiles.html

Regards
/Jonas

(Scott Dorsey) wrote in
:

The .wav file is just a short 56-byte header, followed by 16-bit
samples one after the other.

Well... It's usually a RIFF file with audio data, wich means there can be
other chunks in there as well as the wave data chunks.

Actually, even the audio data can be in a number of different formats,
including compressed ones, so before working on a RIFF wave file you should
allways check what the actual data format is.

Some more info (found by googling):
http://www.sonicspot.com/guide/wavefiles.html

Regards
/Jonas